package com.ken.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.ken.constant.MessageConstant;
import com.ken.dto.UserLoginDTO;
import com.ken.entity.User;
import com.ken.exception.LoginFailedException;
import com.ken.mapper.UserMapper;
import com.ken.properties.WeChatProperties;
import com.ken.service.UserService;
import com.ken.utils.HttpClientUtil;
import com.sun.javafx.collections.MappingChange;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {
    @Autowired
    private  WeChatProperties weChatProperties;
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private UserMapper userMapper;


    @Override
    public User wxLogin(UserLoginDTO login) {
        //授权码
        String code = login.getCode();
        String openid = getOpenid(code);
        if(openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        LambdaQueryWrapper<User> queryWrapper = new LambdaQueryWrapper<User>().eq(User::getOpenid, openid);
        User user = userMapper.selectOne(queryWrapper);
        if (user==null){
            //当前是一个新用户，自动完成注册
            user = new User();
            user.setOpenid(openid);
            user.setCreateTime(LocalDateTime.now());
            userMapper.insert(user);
        }
        return user;
    }


    private String getOpenid(String code) {
        //请求参数封装
        Map map = new HashMap();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        //调用工具类，向微信接口服务发送请求
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        log.info("微信登录返回结果：{}", json);
        //解析json字符串
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        log.info("微信用户的openid为：{}", openid);
        return openid;
    }
}
